I just got my yellow housing. First at the bottom left there's a tiny black discoloration, secondly the yellow seems to be peeling off of the camera sticker and thirdly near the buttons in the middle of the polycarbonate curve you can see the connection between the curved part and the flat part on the bottom, it's an ugly grayish line. And the camera sticker itself is loose and wobbles inside and out if pressed, where if not touched it's a little bit out of place, pushing out of the bottom surface.
What a complete waste of time and money. YES I can send in for a replacement but screw that, not going to wait ANOTHER 40 days to get mine plus the effort to get it from the post office.
Maybe I'll just learn to like my white Lumia and accept that I practically burned my money away.
AGAIN, DO NOT BUY. If yours hasn't shipped refund it before you regret your decision like me. It's really not worth opening up your phone and potentially voiding your warranty or worse damaging some parts only to put on an imperfect, poorly made housing.
On the plus side I got some nice tools to work with in the future, and a free screen cover.
EDIT: The seller has issued me a full refund inc. shipping without asking many questions, I only took pictures of the case and sent it to him via Ebay. Fantastic stuff really, it's rare to see people being just so, unproblematic.